06/0536
The state word reflects the operation state.
State word
State HEX (*) Bit 6 Bit 5 Bit 3 Bit 2 Bit 1 Bit 0
Ready 0x23 0 1 0 0 1 1
Operation enabled 0x27 0 1 0 1 1 1
Fault 0x08 0 x 1 0 0 0
(*)without considering bits 7 to bit 15
Note: A fault occurring leads to a switch-over to the "Fault" state.
A fault can only be acknowled
ed 15 seconds after the occurrence of the
fault, as a blocking time is active internally.
The Warning bit "Bit No. 7" can be set at any time. It displays an device-internal
warnin
messa
e. The evaluation of the warnin
available is done by readin
out the
warning status with the parameter
Warnings 270.
The Remote bit "Bit No. 9" is always = 0.
The bit Reference value reached "Bit No. 10" is set when the reference value
specified has been reached. In the special case of power failure regulation, the bit is
also set if the power failure regulation has reached the frequency 0 Hz (see operating
instructions). For "Reference value reached“ there is a hysteresis (tolerance range),
which can be set via the parameter
max. Control deviation 549 (see operating
instructions).
The bit Limit value active "Bit No. 11" displays that an internal limit is active. This
can, for example, be the present current limit, the torque limit or the overvolta
e
limit. All the functions lead to the reference value being quit or not reached.
The bit Warning 2 "Bit No. 15" reports a warning which leads to a fault switch-off
of the frequency inverter within a short time. This bit is set if there is a warnin
fo
motor temperature, heat sink/inside temperature, Ixt monitoring or mains phase
failure.
9.2 Control via state machine
In the operation mode control via state machine (Local/Remote 412 = 1) the
frequency inverter is controlled via the control word. The possible states are shown in
the diagram. The values on the transition identify these transitions between the
states. The codes shown on the transitions, 0xnn, are the control word needed in
each case (Bit 0 to Bit 7). The codes contained in the states, 0xnn, display the
contents of the state word (Bit 0 to Bit 7).
After mains on (Reset), the frequency inverter is in the state "Switch-on inhibit“
(0x40). With the transitions 4 and 5, there is a change between "Operation enabled“
(0x27, power parts enabled, drive working) and "Ready“ (0x23, power parts blocked).
Release (transition 4) is only possible if the hardware release is available via contact
inputs S1IND/FUF AND (S2IND/STR OR S3IND/STL). They can be firmly wired or also
firmly connected to On/Off via the configuration of the digital inputs. If contact input
S1IND/FUF is switched off, the inverter outputs can be blocked at any time. The drive
then stops freely. There is a transition to "Ready“ (0x23, power parts blocked).
The behavior of transition 5 can be set via the parameter
State transition 5 392.
Here, free stoppin
, shutdown via ramp (reversible) or DC brakin
(see Chapter "
Behavior in transition 5") can be used.
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